Clear Street Group Inc.
· Exited
Change
−91K
Δ Own
−100.0%
Date
Q1 2026
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Clear Street Group Inc.
· Exited
Change
−91K
Δ Own
−100.0%
Date
Q1 2026
|
Clear Street Group Inc. | Exited· Q1 2026 | – | −91K | −100.0% | Q1 2026 | |||||
|
Millennium Management LLC
· Exited
Change
−61K
Δ Own
−100.0%
Date
Q1 2026
|
Millennium Management LLC | Exited· Q1 2026 | – | −61K | −100.0% | Q1 2026 | |||||
|
Citadel Advisors LLC
· Reduced
Change
−32K
Δ Own
−61.8%
Date
Q1 2026
|
Citadel Advisors LLC | Reduced· Q1 2026 | – | −32K | −61.8% | Q1 2026 | |||||
|
Morgan Stanley
· Reduced
Change
−26K
Date
Q1 2026
|
Morgan Stanley | Reduced· Q1 2026 | – | −26K | – | Q1 2026 | |||||
|
Marshall Wace, LLP
· Exited
Change
−23K
Δ Own
−100.0%
Date
Q1 2026
|
Marshall Wace, LLP | Exited· Q1 2026 | – | −23K | −100.0% | Q1 2026 | |||||
|
UBS Group AG
· Added
Change
+21K
Date
Q1 2026
|
UBS Group AG | Added· Q1 2026 | – | +21K | – | Q1 2026 | |||||
|
Simplex Trading, LLC
· Reduced
Change
−19K
Date
Q1 2026
|
Simplex Trading, LLC | Reduced· Q1 2026 | – | −19K | – | Q1 2026 | |||||
|
Susquehanna International Group, LLP
· Reduced
Change
−16K
Date
Q1 2026
|
Susquehanna International Group, LLP | Reduced· Q1 2026 | – | −16K | – | Q1 2026 | |||||
|
Xtx Topco Ltd
· Reduced
Change
−14K
Date
Q1 2026
|
Xtx Topco Ltd | Reduced· Q1 2026 | – | −14K | – | Q1 2026 | |||||
|
Smartharvest Portfolios, LLC
· Added
Change
+12K
Date
Q1 2026
|
Smartharvest Portfolios, LLC | Added· Q1 2026 | – | +12K | – | Q1 2026 | |||||
|
BlackRock
· Reduced
Change
−1K
Date
Q1 2026
|
BlackRock | Reduced· Q1 2026 | – | −1K | – | Q1 2026 | |||||
|
Daiwa Securities Group Inc.
· New
Change
+400
Date
Q1 2026
|
Daiwa Securities Group Inc. | New· Q1 2026 | – | +400 | – | Q1 2026 | |||||
|
Sbi Securities Co., Ltd.
· Added
Change
+133
Date
Q1 2026
|
Sbi Securities Co., Ltd. | Added· Q1 2026 | – | +133 | – | Q1 2026 | |||||
|
Tower Research Capital LLC (trc)
· Exited
Change
−95
Δ Own
−100.0%
Date
Q1 2026
|
Tower Research Capital LLC (trc) | Exited· Q1 2026 | – | −95 | −100.0% | Q1 2026 | |||||
|
Bessemer Group Inc
· Exited
Change
−7
Δ Own
−100.0%
Date
Q1 2026
|
Bessemer Group Inc | Exited· Q1 2026 | – | −7 | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Ip Wing Wai
· Director
2 operations
0
|
Ip Wing Wai | Director | 2 operations | – | 0 | – | 0 | – | Jun 24, 2026 | Jun 24, 2026 | |||||||||
|
Ngai Yuk Chun
· CFO
2 operations
0
|
Ngai Yuk Chun | CFO | 2 operations | – | 0 | – | 0 | – | Apr 1, 2026 | Apr 1, 2026 | |||||||||
N
A
M
T
A
M
16 reporting institutions disclosed AMBR position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.